{
  "nodes": [
    {
      "id": "s",
      "type": "startCall",
      "position": {"x": -200, "y": 0},
      "data": {"name": "Start", "prompt": "Greet the caller."}
    },
    {
      "id": "g",
      "type": "globalNode",
      "position": {"x": 0, "y": 0},
      "data": {"name": "Global", "prompt": "Shared system prompt."}
    },
    {
      "id": "a",
      "type": "agentNode",
      "position": {"x": 200, "y": 0},
      "data": {"name": "Agent", "prompt": "Talk to the caller."}
    }
  ],
  "edges": [
    {
      "id": "g-a",
      "source": "g",
      "target": "a",
      "data": {"label": "global to agent", "condition": "always"}
    }
  ]
}